EP4330095A1 - Diagnoseverfahren und bremssystem mit einer einheit zum durchführen des diagnoseverfahrens - Google Patents
Diagnoseverfahren und bremssystem mit einer einheit zum durchführen des diagnoseverfahrensInfo
- Publication number
- EP4330095A1 EP4330095A1 EP22724671.7A EP22724671A EP4330095A1 EP 4330095 A1 EP4330095 A1 EP 4330095A1 EP 22724671 A EP22724671 A EP 22724671A EP 4330095 A1 EP4330095 A1 EP 4330095A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- diagnostic method
- diagnostic
- activity
- brake
- braking system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
- B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/26—Compressed-air systems
- B60T13/36—Compressed-air systems direct, i.e. brakes applied directly by compressed air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
- B60T13/683—Electrical control in fluid-pressure brake systems by electrically-controlled valves in pneumatic systems or parts thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/88—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
- B60T8/885—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means using electrical circuitry
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/402—Back-up
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/406—Test-mode; Self-diagnosis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/88—Pressure measurement in brake systems
Definitions
- Diagnostic method and braking system with a unit for performing the diagnostic method
- the invention relates to a diagnostic method for carrying out a self-diagnosis of an electronically controllable pneumatic brake system for a commercial vehicle.
- the invention also relates to an electronically controllable pneumatic brake system for a commercial vehicle and a computer program.
- a diagnostic method of the type mentioned is preferably used for electronically controllable pneumatic brake systems of partially or fully autonomous commercial vehicles.
- degrees of automation according to SAE Levels 2 to 5, in particular 4 and 5, such a diagnostic method for carrying out a self-diagnosis makes sense and is preferred.
- Today's braking systems rely on the driver's ability to diagnose and react to errors in the event of various faults that occur very rarely. Mechanical or pneumatic faults are particularly affected, the effects of which on the system may not be connected to any further direct sensor for fault detection. However, if no driver is provided for a partially or fully autonomous vehicle, additional means are required to detect such errors.
- a method is known from DE 10 2018 222 677 A1, which can be used in the so-called platooning of commercial vehicles.
- the method relates to the operation of a vehicle that is set up to drive autonomously at least temporarily, wherein while the vehicle is being operated in a first driving mode in which the vehicle is driving autonomously, it is determined whether one or more switching conditions are met . In case one such a switching condition is met, the vehicle is switched to a second driving mode in which the vehicle is guided. Switching conditions can be, in particular, a difficult route, a construction site or other situations that are difficult to master autonomously. In this case, the second driving mode is switched on, in which the vehicle is guided, for example, by the car in front.
- DE 102017 130549 A1 describes a method for self-diagnosis.
- this document assumes that diagnostic methods for detecting error states are known, but in which the vehicle has to be driven in compliance with certain boundary conditions in order to collect diagnostic data. This is considered to be disadvantageous, since the standard operating mode has to be interfered with and restrictions are thereby imposed on the driver.
- DE 102017 130549 A1 attempts to solve this by providing a dedicated diagnostic mode in which the self-diagnosis is then carried out. Thus, for example, a particular operation desired by the driver is not disrupted by a diagnostic interrupt.
- DE 102013007857 A1 discloses a method for operating a braking system in a motor vehicle having a driver assistance system designed for fully automatic, independent driving.
- the idea described herein is to achieve fail-safe status.
- an action plan is determined, which should then be used if an error occurs.
- the action plan is determined and constantly updated as a function of operating parameters, comprising at least one ego parameter describing the current operating state of the motor vehicle and/or at least one environmental parameter describing the surroundings of the motor vehicle.
- the basic idea of DE 102013007857 A1 is therefore to define a safe state, for example the standstill of the motor vehicle in the lane currently being traveled on or in an adjacent lane, for example an emergency lane.
- an action plan containing braking measures can be determined, that brings about this safe state.
- a braking profile is therefore generated as an action plan during error driving and is constantly updated, with the action plan then being applied in the event of an error.
- DE 102017207476 A1 discloses a method for monitoring a friction brake.
- the braking system is briefly activated by test braking when the vehicle is in a known driving condition.
- By evaluating acceleration values conclusions can then be drawn about the condition of the friction brake.
- determined acceleration values are compared with known values of the braked vehicle. However, it is not disclosed how such values are determined, how they are to be provided, stored or used, nor how the comparison is carried out in detail.
- test brake solution for determining and adjusting the distribution of the braking energy on the brakes according to the response energy.
- the latter discloses a method for simplifying the determination of the response pressure of the brakes of a vehicle.
- test braking operations with low braking pressure are provided, with the braking pressure being varied until a change in the vehicle deceleration is just evident.
- the brake pressure of the brake to be examined is maintained by varying the brake pressure until this causes a change in the vehicle deceleration.
- a braking system and a com provide computer program of the type mentioned, which allow a Starbuckser detection in a simple and safe way.
- a method should also be able to take into account manufacturing, assembly or age-related variances in the brake system. It has been shown, for example, that rigid limit values that are specified during development are not always suitable as limit values for faults in the braking system. Depending on the assembly, manufacturing tolerances or wear and tear, the reactions of the braking system can vary slightly, even if they are still within permissible tolerances.
- errors should also be detected that cannot be detected directly by a sensor or can be determined by a function test.
- the invention solves the problem with a diagnostic method of the type mentioned at the outset with the features of claim 1, namely in particular with the steps: receiving a learning signal at the brake system; in response to receiving the learning signal: placing the braking system in a learning mode and performing the steps of: performing a predetermined first activity of the braking system when the commercial vehicle is stationary or moving; sensing, via a sensor assembly, a first learning system response of the braking system and response to performing the first activity; and storing the detected first learning system reaction as a first target system reaction in a storage unit.
- the invention makes use of the knowledge that a system reaction in a defined state in response to a defined reaction can be recorded and stored in order to then serve as a reference for a subsequent test.
- the diagnostic method is not limited to providing a sensor directly for a module to be tested, a function or a subsystem, but the check can be based on the system reaction on.
- System-inherent properties are also taken into account when recording and storing a system reaction that occurs in response to the execution of a predetermined first activity. For example, every pneumatic brake system has certain leaks that do not negatively affect function, but can affect system response in certain areas. Leaks of this type, which cannot be completely avoided during assembly of the brake system, are inherently taken into account in the diagnostic method according to the present invention.
- the learning mode is preferably only switched on when the commercial vehicle is in a defined state, preferably an error-free state.
- the learning signal can be provided following a factory acceptance test, repair of the commercial vehicle, maintenance or the like. It can be provided that the learning signal can be provided by the driver of the commercial vehicle, for example by actuating a switch, or is received wirelessly via a remote transmitter. It can also be provided that the learning signal may only be provided by the manufacturer of the utility vehicle. In a further variant, it can be provided that the learning signal is triggered and/or provided periodically, as part of a departure check, or based on a routine in a higher-level control unit, for example a control unit for autonomous driving of the commercial vehicle.
- the sensor arrangement that is used to detect the first learning system reaction of the brake system in response to the execution of the first activity is preferably a sensor arrangement that is already present in the brake system, such as sensors installed and present in the brake system, in particular pressure sensors, Wheel speed sensors, wear sensors and the like.
- the first activity may be an activity performed when the commercial vehicle is stationary or an activity performed when the commercial vehicle is moving. Activities performed while the vehicle is moving include especially activities performed at a very low or low speed. Typically, activities when the vehicle is stationary are sufficient to detect most errors. Such activities can be used, for example, to detect leaks in hoses. Activities that need to be performed while the vehicle is moving are in particular those that need to detect a deceleration of the vehicle in order to detect an error. As long as wheel speeds are not important for detecting a fault, an activity that can and should be carried out with the vehicle stationary is usually sufficient, which can increase safety.
- this comprises the steps: performing a first system diagnosis with the steps: performing the predetermined first activity of the brake system when the vehicle is stationary or moving; sensing, with the sensor assembly, a first diagnostic system response of the braking system in response to performing the first activity; Comparing the first diagnosis system reaction in a comparison unit with the pre-stored first target system reaction; and if there is a discrepancy between the first target system reaction and the first diagnosis system reaction: outputting a first error signal.
- the same first activity is therefore carried out to diagnose the brake system as was also carried out when detecting the learning system reaction. In this way, a deviation between the learning system reaction and the actually occurring Systemre action can be determined.
- Limit values are preferably specified for the learning system reaction, which corresponds to the desired system reaction. These limit values can be specified and applied automatically by the braking system, the comparator unit or the like. The limits can be applied depending on one or more parameters.
- the outputting of the first error signal includes: at least partially preventing automated operation of the commercial vehicle.
- the diagnostic method, or at least steps thereof must first be carried out. For example, before activating the automated operation of the commercial vehicle, the comparison between the desired system reaction and the diagnosis system reaction can be carried out.
- the automated operation of the commercial vehicle can be performed, however, if the error signal is issued, execution of the automated operation, partially or fully automated operation is at least partially or completely prevented. In this state, it can then be provided that the commercial vehicle can only be controlled by the driver himself, possibly using a restricted automated operation in which certain systems or subsystems can still be used. This means that even if the error occurs, it is not absolutely necessary for the vehicle to stop immediately or to transfer the vehicle to a safe state. Rather, it can be provided that the commercial vehicle can still be operated, but no longer fully automated.
- the error signal is preferably output via a vehicle bus and in particular to a unit for autonomous driving, which is preferably superordinate to the braking system.
- the predetermined first activity relates only to a first subsystem of the braking system.
- This also allows for a selective or limited test related to the subsystem(s) being diagnosed. should be gene. This is particularly advantageous when, for example, only one or more of a large number of subsystems has been serviced, or only this is necessary for automated operation and the diagnosis is to be subjected to this.
- the diagnostic method preferably also comprises the steps: carrying out a predetermined second activity of the braking system when the commercial vehicle is stationary or moving; detecting with another or the sensor arrangement a second learning system response of the braking system in response to performing the second activity; and storing the detected second learning system reaction as a second target system reaction in a further memory unit or in the memory unit.
- the predetermined second activity can relate to another subsystem of the braking system, or relate to another aspect of the braking system. However, it can also refer to the same subsystem as the first activity, but relate to a different functionality.
- third, fourth, fifth, etc. activities can also be carried out in order to diagnose the brake system as completely as possible.
- third, fourth, fifth, etc. learning system reactions are then also stored as third, fourth, fifth, etc. target system reactions.
- all target system responses are stored in the same memory unit.
- the sensor arrangement may differ depending on the activity.
- a first activity could be the control of a brake pressure on a front axle
- a second activity is the control of a brake pressure on a rear axle.
- a sensor array for determining the first learning system response would include sensors on the front axle
- a sensor array for determining the second learning system response would need to include sensors on the rear axle.
- the method preferably also includes: Carrying out a second system diagnosis with the steps: Carrying out the predetermined second activity of the brake system when the vehicle is stationary or moving: detecting by means of the or the other sensor arrangement a second diagnostic system response of the braking system in response to performing the second activity; Comparing the second diagnostic system reaction in a further unit or the comparison unit with the pre-stored second target system reaction; and if there is a deviation between the second target system reaction and the detected second diagnostic system reaction: outputting a second error signal.
- the second error signal has a different sequence than the first error signal. In particular, this can depend on which system or subsystem of the braking system is addressed by means of the first or second activity. If, for example, functionally critical systems or safety-relevant systems are involved, the output of an error signal should also result in the prevention of further operation of the commercial vehicle. In the case of systems that only restrict autonomous operation, the error signal should result in autonomous operation being prevented. In other cases, for example when comfort systems do not work or do not work properly, it can be provided that the commercial vehicle can continue to be operated or, under certain circumstances, with certain restrictions.
- the step of comparing in the comparator unit is carried out taking into account at least one parameter which is selected from: ambient temperature, reservoir pressure, in particular static reservoir pressure before the start of the diagnostic process or dynamic reservoir pressure profile during the diagnostic process, electrical supply voltage level in the brake system or one or more parts of it, electrical current consumption in the brake system or one or more parts of it.
- the parameters can influence how the system reaction turns out in detail. For example, with a lower reservoir pressure, a lower brake pressure is also to be expected, since this is dependent on the reservoir pressure. A lower brake pressure therefore does not necessarily indicate a leak in a line between an axle modulator and a brake actuator, but can also result from a somewhat lower reservoir pressure. Reliability and robustness of the error detection can thus be improved by taking into account one or more of the parameters mentioned.
- the parameters are preferably also recorded and stored when the target system reaction is determined.
- the parameters are preferably determined and stored when determining the diagnosis system reaction.
- the comparator unit can have algorithms that implement the consideration of the parameter or parameters when comparing.
- the diagnostic system response is made available in a normalized and/or parameter-compensated form and preferably stored, preferably at least in the comparator unit.
- One or more of the parameters mentioned above can be used here. It may also be determined that one or more of the parameters are not within a reasonable range to perform the method. If, for example, one or more of the parameters is outside a range of approximately 20% below or above the nominal value, it may not make sense to carry out the diagnostic method. In this case, it can be canceled, repeated or scheduled for a later date.
- the predetermined first activity is a jump signal at a braking power modulator.
- Such an activity is a clearly defined process.
- a braking signal is output that requests maximum braking force for this period of time. This can apply to each wheel, axle, or to the entire braking system.
- Other predetermined first activities can also include the actuation of specific, possibly individual, electromagnetic valves, such as an ABS valve, activating parking brakes, activating an air suspension, a compressor, a trailer control valve, an electric steering system and the like.
- Activities that can be carried out while the vehicle is moving are, in particular, the actuation of a friction brake in order to detect the state of the brake in this way.
- the diagnosis system reaction is a vehicle deceleration. In this way, a glazed or worn brake pad can be determined, for example.
- the sensor arrangement preferably comprises at least one pressure sensor.
- the pressure sensor is preferably a pressure sensor provided in a modulator of the braking system.
- the diagnostic method can use systems and subsystems that are already present in conventional brake systems.
- the sensor arrangement can include a measuring unit for detecting a volume or mass flow and/or a noise sensor.
- a measuring unit for detecting a volume or mass flow is preferred in order to determine the mass or volume flow of compressed air at a specific point in the system. For example, there are cases in which there is a leak despite the pressure remaining constant, but the compressed air escaping is replenished from the supply and/or replenished by the compressor. In this case, although there is a volume flow of compressed air, a pressure sensor does not determine a drop in pressure. Such a leak can also be detected by providing a measuring unit for detecting a volume or mass flow. An additional noise sensor can only improve the measurement result. If there is a leak, this is usually associated with an acoustic noise.
- noise sensor is used for this purpose.
- noise sensors can also be housed at different positions in the brake system.
- the sensor arrangement can include a unit for olfactory sensing (smell sensor) and/or gas sensor for detecting a fragrance, messenger substance and/or gas.
- a leak in the braking system can also be detected.
- a specific odor or messenger substance that preferably does not occur naturally and/or in the vehicle, or a specific gas, can be added to the compressed air. This can be done for diagnostic purposes only or permanently.
- the odor sensor or gas sensor then provides a corresponding signal, which in turn can be further evaluated and/or processed as part of the diagnostic process.
- a deceleration sensor for determining a deceleration of the commercial vehicle is preferably also used as part of the sensor unit.
- a deceleration sensor can be designed, for example, as a control sensor or gyroscope and is used to detect the vehicle deceleration caused. Additional parameters are preferably taken into account here, such as in particular the load on the vehicle, type of tires, road conditions and the like.
- a gas sensor 207 can also be provided.
- This unit 209 can determine fragrances 301, messenger substances 302 or gases 303 and provide a corresponding olfactory signal SO to the unit for monitoring the health status 200, which is preferably designed to evaluate this.
- FIGS. 4 and 5 illustrate by way of example how comparison 128 of a target system reaction and a diagnosis system reaction can be designed. Both diagrams are pressure-time diagrams with pressure on the ordinate and time on the abscissa. Both diagrams of FIGS. 4 and 5 can be typical of a diagram that is recorded by means of the third pressure sensor 69.
- a target system reaction 210 is formed here by a target pressure profile 212, which is surrounded by an upper limit value 213 and a lower limit value 214.
- the target pressure profile 212 was, for example, in the learning mode 102 by the third pressure sensor 69 in response to the first Activity 104, for example in the form of a step signal SR, is recorded, the upper and lower limit values 213, 214 are specified or calculated, for example by comparator unit 84.
- a diagnostic system reaction 124 is also shown in Figure 4, which is shown here as a diagnostic pressure profile 215 is shown. As can be seen from FIG. 4, the pressure of the diagnostic pressure curve 215 rises much more slowly than that of the setpoint pressure curve 212, only actually reaching the setpoint pressure curve 212 at the point in time t1. A first deviation A1 results at a specific point in time, which varies over time here.
- a target system reaction 210 is again shown, again by a target pressure profile 212, as well as an upper limit value 213 and a lower limit value 214.
- the diagram in FIG. 5 shows two diagnostic system reactions 124a, 124b drawn.
- the diagnostic system reaction 124a can, for example, have been detected at a different point in time than the diagnostic system reaction 124b, for example in two consecutive cycles.
- the diagnosis system reaction 124a with the diagnosis pressure curve 215a shows that the air consumption is too low.
- a second deviation A2 results.
- a possible error here could be se lie in the working path of the brake cylinder.
- the measured pressure is detected, for example, by the first or second pressure sensor 67, 68, which should then detect a drop in pressure when compressed air is consumed, namely in particular during a braking action.
- Diagnostic system reaction 124b with diagnostic pressure profile 215b initially shows a profile that is very close to setpoint pressure profile 212, but then drops more sharply and, in particular, is not constant. It keeps falling over time.
- a third deviation A3 is also variable over time here. This speaks for an undesired leakage, since the pressure continues to drop even in the state when the target pressure curve 212 is static.
- an error signal can be output, which can then have the consequence, for example, that the automated operation and thus the autonomous mode 116 are restricted.
- Health status monitoring unit Power connection of the health status monitoring unit
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Regulating Braking Force (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021110832.2A DE102021110832A1 (de) | 2021-04-28 | 2021-04-28 | Diagnoseverfahren und Bremssystem mit einer Einheit zum Durchführen des Diagnoseverfahrens |
| PCT/EP2022/060565 WO2022228997A1 (de) | 2021-04-28 | 2022-04-21 | Diagnoseverfahren und bremssystem mit einer einheit zum durchführen des diagnoseverfahrens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4330095A1 true EP4330095A1 (de) | 2024-03-06 |
| EP4330095B1 EP4330095B1 (de) | 2026-03-25 |
Family
ID=81750783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22724671.7A Active EP4330095B1 (de) | 2021-04-28 | 2022-04-21 | Diagnoseverfahren und bremssystem mit einer einheit zum durchführen des diagnoseverfahrens |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240075918A1 (de) |
| EP (1) | EP4330095B1 (de) |
| CN (1) | CN117222560A (de) |
| DE (1) | DE102021110832A1 (de) |
| WO (1) | WO2022228997A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| HU231692B1 (hu) * | 2021-06-18 | 2025-09-28 | Vie Technology (Europe) Kft. | Berendezés és eljárás egy pótkocsi pneumatikus csatlakozási állapotának meghatározására |
| DE102021116068A1 (de) * | 2021-06-22 | 2022-12-22 | Zf Cv Systems Global Gmbh | Verfahren zum Inspizieren eines Fahrzeuges und Inspektions-System |
| EP4353549A1 (de) * | 2022-10-14 | 2024-04-17 | TuSimple, Inc. | Automatische parkbremsbetätigung und fehlererkennung |
| DE102023212373A1 (de) * | 2023-12-07 | 2025-06-12 | Continental Automotive Technologies GmbH | Verfahren zum Prüfen zumindest einer Komponente in einem elektrohydraulischen Bremssystem |
| DE102024101558A1 (de) | 2024-01-19 | 2025-07-24 | Bayerische Motoren Werke Aktiengesellschaft | Fahrzeug-Bremssystems sowie Verfahren zum Betreiben eines Fahrzeug-Bremssystems |
| DE102024200574A1 (de) * | 2024-01-23 | 2025-07-24 | Continental Automotive Technologies GmbH | Sicherheitseinrichtung |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19510934A1 (de) | 1995-03-24 | 1996-09-26 | Wabco Gmbh | Verfahren zur Abbremsung eines Fahrzeugs |
| DE19510933A1 (de) | 1995-03-24 | 1996-09-26 | Wabco Gmbh | Verfahren zur Ermittlung des Ansprechdrucks einer durch Druck betätigten Bremse in einem Fahrzeugbremssystem |
| US6343844B1 (en) * | 1999-09-13 | 2002-02-05 | Wabash Technology Corporation | Diagnostic mode selector system for anti-lock brake systems and other electronic systems |
| FR2838091B1 (fr) * | 2002-04-03 | 2005-06-10 | Peugeot Citroen Automobiles Sa | Procede de gestion du stationnement d'un vehicule automobile, et vehicule equipe pour sa mise en oeuvre |
| US7886585B2 (en) * | 2008-07-10 | 2011-02-15 | Gm Global Technology Operations, Inc. | Intake air temperature sensor diagnostic systems with adaptive learning modules |
| DE102010026411A1 (de) * | 2010-07-07 | 2012-01-12 | Man Truck & Bus Ag | Verfahren und Vorrichtung zur Durchführung einer Bremsenprüfung an Anhänger- und/oder Aufliegerfahrzeugen |
| US8492601B1 (en) * | 2012-04-12 | 2013-07-23 | OTG Research, LLC | Methods for converting used oil into fuel |
| DE102013007857B4 (de) | 2013-05-08 | 2022-02-03 | Audi Ag | Verfahren zum Betrieb eines Bremssystems beim vollautomatischen Fahren und Kraftfahrzeug |
| DE102014006614A1 (de) | 2014-05-08 | 2015-11-26 | Wabco Gmbh | Pneumatische Bremseinrichtung für Kraftfahrzeuge und Verfahren zum Betrieb einer pneumatischen Bremsanlage |
| DE102016004489A1 (de) * | 2016-04-18 | 2017-10-19 | Wabco Gmbh | Fahrer-Bremsventil, Druckluft-Bremssystem mit dem Fahrer-Bremsventil und Verfahren zur Herstellung des Fahrer-Bremsventils |
| DE102016112971A1 (de) * | 2016-07-14 | 2018-01-18 | Ipgate Ag | Diagnoseverfahren für mindestens eine Komponente eines Kraftfahrzeugs |
| CN106828474B (zh) * | 2017-02-28 | 2018-08-03 | 杭州衡源汽车科技有限公司 | 一种基于学习机制的制动方法及系统 |
| DE102017003782A1 (de) | 2017-04-20 | 2018-10-25 | Wabco Gmbh | Verfahren zum Überwachen einer Umsetzung einer automatisiert angeforderten Bremsvorgabe sowie Bremssystem |
| DE102017003784A1 (de) | 2017-04-20 | 2018-10-25 | Wabco Gmbh | Verfahren zum Einlernen von Schaltparametern eines Magnetsteuerventils in einem Bremssystem eines Fahrzeuges sowie Bremssystem |
| DE102017207476A1 (de) | 2017-05-04 | 2018-11-08 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Überwachen einer Bremsanlage eines Fahrzeugs |
| US20200134939A1 (en) * | 2018-10-25 | 2020-04-30 | Applied Mechatronic Products, Llc | Apparatus and method for vehicular monitoring, analysis, and control |
| DE102017130549A1 (de) | 2017-12-19 | 2019-06-19 | Volkswagen Aktiengesellschaft | Verfahren zur Durchführung einer Eigendiagnose bei einem autonomen Fahrzeug |
| DE102018222677A1 (de) | 2018-12-20 | 2020-06-25 | Robert Bosch Gmbh | Verfahren zum Betreiben eines zeitweise autonom fahrenden Fahrzeugs |
| US11161488B2 (en) | 2019-10-30 | 2021-11-02 | Deere & Company | Brake compliance calibration with electrohydraulic brakes |
-
2021
- 2021-04-28 DE DE102021110832.2A patent/DE102021110832A1/de active Pending
-
2022
- 2022-04-21 WO PCT/EP2022/060565 patent/WO2022228997A1/de not_active Ceased
- 2022-04-21 EP EP22724671.7A patent/EP4330095B1/de active Active
- 2022-04-21 CN CN202280031311.7A patent/CN117222560A/zh active Pending
-
2023
- 2023-10-30 US US18/497,657 patent/US20240075918A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN117222560A (zh) | 2023-12-12 |
| EP4330095B1 (de) | 2026-03-25 |
| US20240075918A1 (en) | 2024-03-07 |
| DE102021110832A1 (de) | 2022-11-03 |
| WO2022228997A1 (de) | 2022-11-03 |
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